See more: Crankshaft Parts
7. Pinion Shaft for Big Twin, Fits 1939-1953, Jims USA (OEM 24007-39)
A wide selection of high quality replacement parts for all Big Twin models 1936 thru 1999, except 1999 Twin Cam. Each part is quality checked. Crank pins and shafts are machined from super tough, aircraft quality steel, heat treated and hardened to 61-63 on the Rockwell scale.